Dividing walls are drawn as masonry running from façade to courtyard walls along
the plant octagon major diagonals. The only variable needing determination is the
width of this wall, which is labeled p, folio 123:02.

The separating wall width was apparently determined heuristically; no geometric
relationship has been identified. This wall has no structural function, other than
bearing its own mass.

Consistent with the recession of the indoor faces of the rooms on the façade and
courtyard walls, the faces of the dividing walls on the upper floor are also recessed,
resulting in a reduced width of the dividing wall
on the upper floor compared to the ground floor.

Besides diving the floor space in eight equal rooms, the dividing wall also
serves to cover the joint of two adjacent vaults that come together
along the major diagonal at the angle of 22.5°.

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